DE3032140A1 - METHOD AND DEVICE FOR TREATING LIQUIDS AND / OR COARSE PIECES OF MATERIALS IN SOLID STATE WITH GASES. - Google Patents

Description

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HOFFMANN · BITLK & PARTNER

PAT E N TAN ELECTS E.

DR. ING. E. HOFFMANN (1930-1976). DI P L.-l N G. W. EITLE · D R. R E R. N AT. K. HO FFMAN N DI PL.-1N G. W. LEHN

DIPL.-ING. K.FDCHSLE DR. RER. NAT. B. HANSEN ARABELLASTRASSE 4 D-8000 MO NCH EN 81 TELE FON (089) 911087 TELEX 05-29619 (PATHE)

33 850

MTA Müszaki Kemiai Kutato Intezet, Veszprem Hungary

Method and device for treating liquids and / or lumpy materials in the solid state with Gases

The invention relates to a method for treating liquids and / or lumpy materials in the Solid state with gases in a bounded by one or more walls and divided by at least one partition Space. The invention also relates to a device for carrying out the method, which is directed in the direction of the longitudinal axis is provided with one or more boundary walls and at least one partition wall.

It is known that agents are mixed in different states with static mixing elements and thereby with one another can be intimately associated. An intimate connection is to be understood as meaning that the bevels are finely divided

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and thus possibly on a very large area with each other be associated for a long time, aiming for a boundary layer that is as thin as possible. That Mixing and bringing into intimate association make it possible to treat the agents, e.g. B. to ventilate, too react, dry, etc.

With static mixing, the mixing elements stand while the media flow. For the static mix several methods and devices are already known.

According to US Pat. No. 2,847,649, in a cylindrical space arranged a helical element which exerts a mixing effect. According to US Pat. No. 2,847,196, in turn, a Double screw applied.

According to US Pat. No. 3,286,992, the liquid flowing in a tube of the device is forced to move radially perpendicularly to the tube axis by means of helical partitions arranged one after the other in the tube, dividing the tube into two parts in the direction of the axis and twisted in opposite directions one after the other. The edges of the mutually contacting helical partition walls in opposite directions are arranged at an angle to one another and the tube is divided into two channels with the same cross section by a series of partition walls.

Flow according to U.S. Patents 3,871,624 and 3,918,688 two chamfers in predetermined, parallel channels of constant cross-section formed by partitions of the same length., wherein the channels in the longitudinal direction of the tube are arranged perpendicular to one another and displaced with respect to one another are. This system of channels constantly breaks the agent into parts, thereby mixing it.

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In all of the methods mentioned, the delimited space, e.g. B. the interior of a tube in which the agent flow, divided into spaces with a constant cross-section by a partition wall parallel to the pipe axis. The mixing effect is created by a flow in the direction of the axis, i. H. achieved by vertical forced flow as well as by further dismantling the means. The partition or the partitions are made of mutually in contact, in the longitudinal direction of the Tube arranged pieces formed.

A disadvantage of the above-mentioned devices and mixing methods is that they are actually used for mixing Energy is relatively low and therefore the necessary value of L / D (length / diameter) is relatively large. The mixture is thus more like a "plug flow" than a laminar flow in an empty pipe. The shearing action that occurs is small, which is why many units have to be arranged one after the other, to achieve the necessary mixing effect. With an increase in dimensions, the necessary production technology Modification considerably to produce a good static mixing insert. In a given Device, the relative infeed speed of the chamfers can only be changed between narrow limits. The device of US Pat. No. 3,871,624 is particularly prone to contamination.

In addition, injectors are known which have a confuser at the entry point and one at the exit point Have diffuser. It is also previously known that a means of a predetermined amount by alternating opposite directions in Movement networks can be brought into resonance.

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The object of the present invention is to provide a method and a device for carrying out the method to create, in which or in which a stronger mixing effect / and associated with it a more intimate connection, i.e. a more intensive treatment of the means can be achieved. The manufacture of the facility is intended be simple and inexpensive.

With a fine method, this task becomes the one described at the beginning Type achieved according to the invention in that the flow rate of at least the agent in the Gas state varies in opposite directions, being changed at least two, separated by one or more partition walls Means are brought into contact with each other at given intervals of change in speed, and the Agents made from liquid and / or lumpy materials in the plague state by flowing the agent in the gaseous state into Flow are brought and / or their flow velocity and / or direction are changed, if necessary the Means are brought to or near their resonance point by the always opposing speed changes and optionally the means upon entering the wall delimited by at least one wall and by at least one Partition wall divided space accelerated in stages and / or decelerated in stages when exiting.

The solution to the problem is based on the knowledge that the mixing effect of the previously known methods and devices can be expanded considerably if the flow of the parallel, but separated flowing means - on the one hand the liquid and / or the coarse-grained materials in the solid state,, on the other hand, the means in the gas state - by inclining the partition walls at an angle that varies in opposite directions to the pipe axis

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varies in opposite directions, with the flowing mean high speed at the discontinuities the partition walls or through them is brought into connection with the flowing medium of low velocity. By this simple arrangement will create the mixing effect due to the suction of the faster flowing Surprisingly increased by means of. This creates a great local turbulence even if the flow of the media is laminar. It has also been recognized that the suction effect of the agent is greater Speed is so considerable that, surprisingly, an increased suction effect is observed even then can, if the partitions, which are inclined to the pipe axis, are simply made from flat panels.

It has also been recognized that a single means varies in opposite directions in speed (the gas phase), by its acceleration and deceleration also another medium (the liquid or the coarse material in the solid state) is brought into flow can be. On the other hand, this means that the flow rate of the medium also in a given facility can be changed between wide limits.

According to the invention, it is sufficient in a bounded by a wall Space, e.g. B. in a tube, two means formed by one of a number of suitably arranged plates To bring the partition wall into the flow that the flow rate of one medium increases or alternately is reduced and this means in the case of the discontinuities of the row. of the successive plates or through them is associated with the other agent. The he-. of course, several can be found through the partition walls separated agents are brought into flow and the

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Speed at least one of these means are alternately increased or decreased.

According to a further finding, the beneficial effect described above is also achieved when the partition walls are arranged in a straight line and the boundary walls are structured with various notches and not the boundary walls are straight and not the partition walls varied under a pointed or a blunt Angle to the longitudinal axis are arranged.

According to the invention, the beneficial effects can be achieved with a smaller energy requirement if that in the Means entering the static part of the mixing chamber are gradually accelerated and, when exiting, are gradually delayed will.

According to a further finding of the invention, the change in speed in opposite directions varies with Hirblick on the resonance of a given mass equivalent to the movement in the opposite direction varies. So can Surprisingly, the system consisting of the agent to be treated and the gas in resonance or in the vicinity of the Resonance. Less energy is also required for flow in this area.

The object on which the present invention is based is achieved according to the invention in a device for carrying out the The method achieved in that it is equipped with at least one partition which varies at least partially. an optionally changeable acute angle or obtuse angle to the longitudinal axis and / or to one about the longitudinal axis located, preselected plane or to the walls around the longitudinal axis and an optionally changeable That has discontinuity in the area of the entry point

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the means gradually narrowing partition and / or boundary walls and in the area of the exit point delimitation walls widening in stages, as well as through the delimitation walls and the partition walls as well possibly delimited the boundary walls, in Direction of the longitudinal axis varies at least partially, narrowing or widening spaces are provided.

The plane laid over the longitudinal axis must be selected beforehand. In comparison, at least a part of the partition walls of 4 must be arranged at an acute or obtuse angle . After the partition walls have been arranged, a different plane can usually be found that can be laid over the longitudinal axis, whereupon half of the partition walls that have an acute or obtuse angle to one plane are perpendicular, the other half of the partition walls always to this other plane have an acute or an obtuse angle.

In one embodiment of the device according to the invention the partition walls always close the same acute or obtuse angle with the longitudinal axis, the plane a-b or with the boundary walls. However, the acute and obtuse angles can also be variable. He can change Be angles in the sense that the successive acute angles or the successive obtuse angles have different sizes, but also that they create the single space or a narrowing or expanding space Partition walls and / or boundary walls have a constantly changing angle to one another. So has an embodiment of the invention on one or more partition walls or partition wall pieces that have a changing butt or acute angle to the longitudinal axis and / or over the

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Longitudinal axis laid, selected plane a-b or the boundary walls around the longitudinal axis.

The invention is explained in more detail below with reference to the drawing with reference to exemplary embodiments. In the Show drawing

Fig. 1 to 6 different sections through embodiments the invention.

In Fig. 1, a partition 1 placed around the longitudinal axis has a circular cross-section. The partitions 2 close with the longitudinal axis, for. B. alternately with the direction of an arrow AB an acute angle ° <and an obtuse angle ß a. In this exemplary embodiment, the angles * ^ and / 2 are secondary angles.

A space part I narrows in the direction of the longitudinal axis (arrow AB). At the same time, a room part II expands. A through the boundary wall delimited space part III has a constant cross section. A room part IV expands in the direction the longitudinal axis, while a part of space V narrows. The room part I and then the room parts IV and VII as well as the Parts of the room II, V, VIII etc. narrow and widen alternately. They also alternately narrow and widen the spatial parts I, II or IV and V etc. In another embodiment of the invention narrow and widen alternately the space parts I, IV, VII, etc., the space parts II, V, VIII, etc. have a constant cross-section. The partitions in FIG. 2 can be viewed as a single partition which has 5 discontinuities. In Fig. 2 an arrow A indicates the introduction of one agent, an arrow B that of the other agent. Arrow AB in turn denotes

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records the mixed funds leaving the facility. Through the boundary walls 8 is a confuser, d. H. a narrowing space is formed at the introduction of the means A and B, whereby the means are gradual be accelerated. Through the boundary walls 9 is a diffuser, i. H. an expanding space the execution of the means AB, whereby the means AB is gradually delayed.

From Fig. 1a (section C-C of Fig. 1) it can be seen that a single partition 2 is arranged within the boundary wall, thereby dividing the space into two parts is. In Fig. 1b three mutually touching partition walls 2 are shown at an angle, whereby the space within the boundary wall 1 is divided into three parts. In Fig. 1c the space within the boundary wall 1 is through six partition walls 2 touching each other in the axis divided.

In Fig. 2, the boundary wall 1 has a square cross-section. The partitions 2, 3, 4 have different lengths. The partition 3 extends as far as the boundary wall 1, which enables the means B to be introduced from the side. The partition walls 2 and 4 form a coherent, single partition wall which has the discontinuities 5. In Fig. 2 the discontinuities 5 are formed by perforated holes or by a mesh, ⁰ ^ and ß are not secondary angles here.

In Fig. 3a and 3b, the partition 2 is alternately at an acute or an obtuse angle to the longitudinal axis laid level a-b arranged. In Fig. 3a the selected plane a-b is perpendicular to the plane of the drawing. the

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Partition walls 2 'alternately enclose an acute or obtuse angle with this plane. You also have at the same time an acute or obtuse angle to the longitudinal axis. In Fig. 3b an extreme case of the above arrangement is shown, where the selected plane a-b encloses any angle with the plane of the drawing and the Partition walls 2 alternately have an acute or obtuse angle to the plane a-b. The a-b level is in j rotated the plane of the drawing. Half of the partition walls 2 are perpendicular to the rotated plane a-b.

In Fig. 4, the partition walls 2 are arranged in one plane. They can be seen as a single partition 2, which has discontinuities. In the boundary wall 1, which in this example has a square cross-section, are constrictions formed by angular indentations 6 and circular indentations 7. The constrictions form with the partition 2 together create a space that initially narrows, then expands in the direction of the flow.

In Fig. 5, a device similar to the device in Fig. 1 is shown. The boundary wall 1 with the confuser and diffuser-delimiting boundary walls 8 and 9 together form an arch that contains a given amount of substance assigned changed resonance point.

In FIG. 6, the partition walls 2 are arranged in a helical shape, the axis of which encloses a certain angle with the longitudinal axis. Thus, the partition walls 2 have a constant relation to a preselected plane a-b laid over the longitudinal axis. changing angle. The successive partitions 2 have an opposite helical shape and the ends of the partitions are at a predetermined angle to the beginning of the next Partition wall 2 arranged rotated.

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In the work of the facility, the elements and the facility do not move. ' In the facility flow respectively at least two remedies. These means can be made of the same material. However, in such a case you have in iryend a physical characteristic value (e.g. in relation to temperature). In the drawing are mostly two remedies shown and marked with A and B. The means A and B flow through into the device like this the arrows are indicated. At the other end of the facility, a completely mixed agent AB emerges.

The application of the method and the device is explained in more detail by the following examples.

example 1

In a liquid stored in a container (e.g. water, Methanol, acetone, etc.) a gas (e.g. air) is distributed in the form of fine bubbles. With the conventional introduction of air (e.g. with a nozzle head from below), primary bubbles of 10 - 50 μm are created, which are located at a height of H = 0.3 0.5 m unite to form bubbles on the order of centimeters.

In the device according to the invention, cm-sized bubbles are introduced. Using a pipe diameter of 50 mm and the arrangement of a total of ten helical partition wall elements laid in opposite directions with a length of mm, bubbles of 10-50 μm are produced. The homogeneity of the dispersion - measured immediately after the last element - has a value of G ^ / B ^^ = 10 ~ ² .

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Example 2

In a pond for waste water a (^ concentration greater than 2 mg / 1 is achieved. By contacting the water surface with the air with the help of a paddle mixer, an efficiency of W = 0.7 _{is achieved when the O 2 content in the water is dissolved} With the device according to the invention with a pipe diameter of 100 mm and a length of L = 1000 mm and with partition wall elements with lengths of 100 mm, an efficiency of l \ = 0.85-0.90 is achieved.

The energy requirement when introducing an air volume of 0.6-0.8 m / min

- with a mechanical surface mixer 1.7 - 2.5 HP / 100 m ³ ,

^{- 1.1-1.8 PS / 100 m 3} in the method according to the invention

(In the latter case, a compressor efficiency of 70% was assumed).

Example 3

In a biological reactor there is a flow velocity at the bottom of the liquid of at least 15 cm / s is required, which is achieved by a surface mixer at a depth of max. 1 m can be reached.

With the device according to the invention, the entire amount can be mixed with a flow rate per unit of 1 - 3 m / h. The efficiency of the mixture increases with the increase the fluid level. At the specified delivery rate, 10-15g of solid materials per liter can be kept in suspension will.

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Example 4

A PVC powder produced in the suspension process is mixed with Master mix colored. 0.5 kg of the master mix is added to 100 kg of PVC powder.

In a conventional ribbon mixer with periodic operation - which has a capacity of 1.2 m - the necessary length of stay is 30-45 min, the necessary power P = 4-5 kW / m ³ .

In a device according to the invention with a pipe diameter of 100 mm. and a pipe length of 2 m, with an air consumption of 50-60 m / h under a pressure of ρ = 2 atü, a capacity of 30 m / h can be achieved. The necessary length of stay is 1/6 to 1/10 in relation to the previously known device. With a filling capacity of 1.2 m, the previously known device has an output of 1.6 to 2.4 m / h. The device according to the invention, on the other hand, has a 10 to 20 times higher performance.

The application of the method and the device according to the invention was explained with the aid of the examples. Of course, the invention can also be used in many other areas. The invention is therefore not limited to the cases described in the examples and shown in the drawing.

The invention is based on the operating parameters set out above cheaper and more cost-effective than previously known static fan and mixing methods and machines. By using the method according to the invention and the direction can have an increased dispersion and mixing effect

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and consequently a larger contact area as well as material and / or heat transfer can be achieved. A shorter pipe length and less energy have the same effect sufficient. Significantly less or no sales develop in the facility.

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Claims (13)

3032U0 HOFFMANN · ISITIJE & PAITTNER PATIiNTANWALTK DR. ING. E. HOFFMANN (1930-1976) -DIP L.-I N G. W. EITLE · DR.RE R. NAT. K. HOFFMANN · DI PL.-IN G. W. LEHN DIPL.-1NG. K. FDCHSLE ■ DR. RER. NAT. B. HANSEN ARABELLASTRASSE 4 D-8000 MO N C H EN 81 ■ TE LE FON (089) 9i 1087 f E LEX 05-29019 (PATH E) 850 MTA Müszaki Kemiai Kutato Intezet, Veszprem Hungary Method and device for treating liquids and / or lumpy materials in the solid state with Gases Claims Method and device for treating liquids and / or lumpy materials in the solid state with gases in a bounded by one or more walls and divided by at least one partition Space, characterized in that the flow rate of at least the medium in Gas state varies in opposite directions, being changed at least two, separated by one or more partition walls The means are brought into contact with one another at given intervals of the change in speed, and the means of liquid and / or lumpy materials in the .Feststatus by flowing the means 1 3001 1/0785 are brought into flow in the gas state and / or their flow velocity and / or direction are changed be, if necessary, the means by the always opposing directions Changes in speed are brought to their resonance point or its vicinity, and if necessary the means when entering the bounded by at least one wall and by at least one partition divided space can be accelerated in stages and / or retarded in stages when exiting. 2. The method according to claim 1, characterized in that in at least part of the alternating opposite speed change also a deviating from the main flow direction of the axial direction, in the extreme case this vertical flow is generated. 3. The method according to claim 2, characterized net that that of the main flow direction of the axial direction deviating, in extreme cases perpendicular to this flow at the end of the section varies the opposite Speed change or thereafter is generated. 4. The method according to claim 2 or 3, characterized in that the means dur ^ h the curvature the dividing wall in a direction deviating from the main flow direction, in extreme cases almost perpendicular to it Forced flow are brought. 5. The method according to claim 1 to 4, characterized in that the means in the individual intervals the change in speed by breaking the continuity of the dividing wall or walls with one another be associated. 13001 1/0785 30321 6. The method according to claim 1 to 5, characterized in that the separated by the partitions, means moving in parallel. the discontinuities of the partitions with those facing the flow Edges of the partitions are divided simultaneously or shifted in the direction of the flow. 7. The method according to claim 1 to 6, characterized in that the mutually parallel moving means according to the discontinuities of the partition walls by swiveling away those standing opposite the flow Edges are divided at a predetermined angle to the previous partition wall end. 8. Device for performing the method according to claim 1 to 7, which in the direction of the longitudinal axis with at least a boundary wall and at least one partition wall is provided, characterized in that it is equipped with at least one partition (1), which at least partially varies an optionally changeable acute angle or obtuse angle to the longitudinal axis and / or to one located above the longitudinal axis, has preselected plane (a-b) or to the walls around the longitudinal axis and an optionally changeable discontinuity has that in the area of the entry point of the means step-like narrowing separation and / or Boundary walls (8) and boundary walls (9) widening in steps in the area of the exit point as well bounded by the boundary walls (1) and the partition walls (2) and possibly the boundary walls, in Narrowing or widening spaces (I-VIli provided are. 13001 1/0785 9. Device according to claim 8, characterized in that it is provided with at least one partition or a partition piece (2, 3, 4) is provided which has a changing acute or obtuse angle to the longitudinal axis and / or to a preselected plane (a-b) laid over the longitudinal axis. 10. Device according to claim 8 to 10, characterized in that the partition or the partitions (2) have discontinuities (5). 11. Device according to claim 8 to 10, characterized in that it has at least one helical partition (2) is equipped, which has a constantly changing angle to one above the longitudinal axis located, preselected plane (a-b) and varies at an acute or obtuse angle to the longitudinal axis. 12. Device according to claim 11, characterized in that they are in opposite directions Direction rotated, successive partition walls (2) is provided. 13. Device according to claim 8 to 10 or 11 or 12, characterized gekennzeichn et that some or all of the partitions (2) are twisted at an angle that is defined by comparing the entry and exit angles. 130011/0785